var Audio=Class.create({initialize:function(player,stop,tracks,options){this.player=player;this.stop=stop;this.tracks=tracks;this.setOptions(options);if(this.options.waitForLoad){Event.observe(document,"dom:loaded",this.setup.bind(this));}else{this.setup();}},clearPlaying:function(){for(var i=0,n=this.tracks.length;i<n;i++){var element=$(this.tracks[i].element);if(element.hasClassName(this.options.playingCss)){element.removeClassName(this.options.playingCss);}}},setOptions:function(options){this.options={playingCss:"playing",waitForLoad:true};Object.extend(this.options,options);},setup:function(){this.playerString=this.player;this.player=document[this.player]||window[this.player];Event.observe(this.stop,"click",this.onStopClick.bindAsEventListener(this));for(var i=0,n=this.tracks.length;i<n;i++){Event.observe(this.tracks[i].element,"click",this.onTrackClick.bind(this,this.tracks[i]));}},onStopClick:function(){this.player.stopSound();this.clearPlaying();},onTrackClick:function(track){this.player.playSong(track.url);this.clearPlaying();$(track.element).addClassName(this.options.playingCss);}});
var ImageChanger=Class.create({initialize:function(label,input,deleteLink,options){this.label=label;this.input=input;this.deleteLink=deleteLink;this.setOptions(options);if(this.options.waitForLoad){Event.observe(document,"dom:loaded",this.setup.bind(this));}else{this.setup();}},setOptions:function(options){this.options={waitForLoad:true};Object.extend(this.options,options);},setup:function(){this.label=$(this.label);this.input=$(this.input);this.deleteLink=(this.deleteLink)?$(this.deleteLink):null;this.changeLink=new Element("a",{href:"javascript:void(0);",style:"display:none;"}).update("change");this.cancelLink=new Element("a",{href:"javascript:void(0);",style:"display:none;"}).update("cancel");this.label.insert({after:this.changeLink}).insert({after:" "});this.input.insert({after:this.cancelLink}).insert({after:" "});Event.observe(this.changeLink,"click",this.onChangeClick.bindAsEventListener(this));Event.observe(this.cancelLink,"click",this.onCancelClick.bindAsEventListener(this));if(this.deleteLink&&this.label.innerHTML){this.input.hide();this.changeLink.show();}else{this.label.hide();this.deleteLink.hide();}},onCancelClick:function(){this.input.hide();this.cancelLink.hide();this.label.show();this.changeLink.show();this.deleteLink.show();},onChangeClick:function(){this.label.hide();this.changeLink.hide();this.deleteLink.hide();this.input.show();this.cancelLink.show();}});
var Markdown=Class.create({initialize:function(element,options){this.element=element;this.setOptions(options);if(this.options.waitForLoad){Event.observe(document,"dom:loaded",this.setup.bind(this));}else{this.setup();}},setOptions:function(options){this.options={waitForLoad:true};Object.extend(this.options,options);},setup:function(){this.element=$(this.element);this.previewLink=new Element("a",{href:"javascript:void(0);"}).update("preview");this.cancelLink=new Element("a",{href:"javascript:void(0);",style:"display:none;"}).update("edit");this.previewElement=new Element("div",{style:"display:none;"});this.element.insert({after:this.previewLink});this.element.insert({after:new Element("br")});this.element.insert({before:this.previewElement});this.previewElement.insert({after:this.cancelLink});Event.observe(this.previewLink,"click",this.onPreviewClick.bindAsEventListener(this));Event.observe(this.cancelLink,"click",this.onCancelClick.bindAsEventListener(this));},onCancelClick:function(){this.cancelLink.hide();this.element.show();this.previewLink.show();this.previewElement.hide();},onPreviewClick:function(){this.element.hide();this.previewLink.hide();this.previewElement.show();this.cancelLink.show();this.previewElement.innerHTML=new Showdown.converter().makeHtml(this.element.value);}});
var Showdown={};Showdown.converter=function(){var g_urls;var g_titles;var g_html_blocks;var g_list_level=0;this.makeHtml=function(text){g_urls=new Array();g_titles=new Array();g_html_blocks=new Array();text=text.replace(/~/g,"~T");text=text.replace(/\$/g,"~D");text=text.replace(/\r\n/g,"\n");text=text.replace(/\r/g,"\n");text="\n\n"+text+"\n\n";text=_Detab(text);text=text.replace(/^[ \t]+$/mg,"");text=_HashHTMLBlocks(text);text=_StripLinkDefinitions(text);text=_RunBlockGamut(text);text=_UnescapeSpecialChars(text);text=text.replace(/~D/g,"$$");text=text.replace(/~T/g,"~");return text;};var _StripLinkDefinitions=function(text){var text=text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/gm,function(wholeMatch,m1,m2,m3,m4){m1=m1.toLowerCase();g_urls[m1]=_EncodeAmpsAndAngles(m2);if(m3){return m3+m4;}else if(m4){g_titles[m1]=m4.replace(/"/g,"&quot;");}
return"";});return text;};var _HashHTMLBlocks=function(text){text=text.replace(/\n/g,"\n\n");var block_tags_a="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
var block_tags_b="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
text=text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm,hashElement);text=text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm,hashElement);text=text.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,hashElement);text=text.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,hashElement);text=text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,hashElement);text=text.replace(/\n\n/g,"\n");return text;};var hashElement=function(wholeMatch,m1){var blockText=m1;blockText=blockText.replace(/\n\n/g,"\n");blockText=blockText.replace(/^\n/,"");blockText=blockText.replace(/\n+$/g,"");blockText="\n\n~K"+(g_html_blocks.push(blockText)-1)+"K\n\n";return blockText;};var _RunBlockGamut=function(text){text=_DoHeaders(text);var key=hashBlock("<hr />");text=text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,key);text=text.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,key);text=text.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,key);text=_DoLists(text);text=_DoCodeBlocks(text);text=_DoBlockQuotes(text);text=_HashHTMLBlocks(text);text=_FormParagraphs(text);return text;};var _RunSpanGamut=function(text){text=_DoCodeSpans(text);text=_EscapeSpecialCharsWithinTagAttributes(text);text=_EncodeBackslashEscapes(text);text=_DoImages(text);text=_DoAnchors(text);text=_DoAutoLinks(text);text=_EncodeAmpsAndAngles(text);text=_DoItalicsAndBold(text);text=text.replace(/  +\n/g," <br />\n");return text;};var _EscapeSpecialCharsWithinTagAttributes=function(text){var regex=/(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;text=text.replace(regex,function(wholeMatch){var tag=wholeMatch.replace(/(.)<\/?code>(?=.)/g,"$1`");tag=escapeCharacters(tag,"\\`*_");return tag;});return text;};var _DoAnchors=function(text){text=text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeAnchorTag);text=text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeAnchorTag);text=text.replace(/(\[([^\[\]]+)\])()()()()()/g,writeAnchorTag);return text;};var writeAnchorTag=function(wholeMatch,m1,m2,m3,m4,m5,m6,m7){if(m7==undefined)m7="";var whole_match=m1;var link_text=m2;var link_id=m3.toLowerCase();var url=m4;var title=m7;if(url==""){if(link_id==""){link_id=link_text.toLowerCase().replace(/ ?\n/g," ");}
url="#"+link_id;if(g_urls[link_id]!=undefined){url=g_urls[link_id];if(g_titles[link_id]!=undefined){title=g_titles[link_id];}}
else{if(whole_match.search(/\(\s*\)$/m)>-1){url="";}else{return whole_match;}}}
url=escapeCharacters(url,"*_");var result="<a href=\""+url+"\"";if(title!=""){title=title.replace(/"/g,"&quot;");title=escapeCharacters(title,"*_");result+=" title=\""+title+"\"";}
result+=">"+link_text+"</a>";return result;};var _DoImages=function(text){text=text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeImageTag);text=text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeImageTag);return text;};var writeImageTag=function(wholeMatch,m1,m2,m3,m4,m5,m6,m7){var whole_match=m1;var alt_text=m2;var link_id=m3.toLowerCase();var url=m4;var title=m7;if(!title)title="";if(url==""){if(link_id==""){link_id=alt_text.toLowerCase().replace(/ ?\n/g," ");}
url="#"+link_id;if(g_urls[link_id]!=undefined){url=g_urls[link_id];if(g_titles[link_id]!=undefined){title=g_titles[link_id];}}
else{return whole_match;}}
alt_text=alt_text.replace(/"/g,"&quot;");url=escapeCharacters(url,"*_");var result="<img src=\""+url+"\" alt=\""+alt_text+"\"";title=title.replace(/"/g,"&quot;");title=escapeCharacters(title,"*_");result+=" title=\""+title+"\"";result+=" />";return result;};var _DoHeaders=function(text){text=text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,function(wholeMatch,m1){return hashBlock("<h1>"+_RunSpanGamut(m1)+"</h1>");});text=text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,function(matchFound,m1){return hashBlock("<h2>"+_RunSpanGamut(m1)+"</h2>");});text=text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,function(wholeMatch,m1,m2){var h_level=m1.length;return hashBlock("<h"+h_level+">"+_RunSpanGamut(m2)+"</h"+h_level+">");});return text;};var _ProcessListItems;var _DoLists=function(text){text+="~0";var whole_list=/^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;if(g_list_level){text=text.replace(whole_list,function(wholeMatch,m1,m2){var list=m1;var list_type=(m2.search(/[*+-]/g)>-1)?"ul":"ol";list=list.replace(/\n{2,}/g,"\n\n\n");;var result=_ProcessListItems(list);result=result.replace(/\s+$/,"");result="<"+list_type+">"+result+"</"+list_type+">\n";return result;});}else{whole_list=/(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;text=text.replace(whole_list,function(wholeMatch,m1,m2,m3){var runup=m1;var list=m2;var list_type=(m3.search(/[*+-]/g)>-1)?"ul":"ol";var list=list.replace(/\n{2,}/g,"\n\n\n");;var result=_ProcessListItems(list);result=runup+"<"+list_type+">\n"+result+"</"+list_type+">\n";return result;});}
text=text.replace(/~0/,"");return text;};_ProcessListItems=function(list_str){g_list_level++;list_str=list_str.replace(/\n{2,}$/,"\n");list_str+="~0";list_str=list_str.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,function(wholeMatch,m1,m2,m3,m4){var item=m4;var leading_line=m1;var leading_space=m2;if(leading_line||(item.search(/\n{2,}/)>-1)){item=_RunBlockGamut(_Outdent(item));}
else{item=_DoLists(_Outdent(item));item=item.replace(/\n$/,"");item=_RunSpanGamut(item);}
return"<li>"+item+"</li>\n";});list_str=list_str.replace(/~0/g,"");g_list_level--;return list_str;};var _DoCodeBlocks=function(text){text+="~0";text=text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,function(wholeMatch,m1,m2){var codeblock=m1;var nextChar=m2;codeblock=_EncodeCode(_Outdent(codeblock));codeblock=_Detab(codeblock);codeblock=codeblock.replace(/^\n+/g,"");codeblock=codeblock.replace(/\n+$/g,"");codeblock="<pre><code>"+codeblock+"\n</code></pre>";return hashBlock(codeblock)+nextChar;});text=text.replace(/~0/,"");return text;};var hashBlock=function(text){text=text.replace(/(^\n+|\n+$)/g,"");return"\n\n~K"+(g_html_blocks.push(text)-1)+"K\n\n";};var _DoCodeSpans=function(text){text=text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,function(wholeMatch,m1,m2,m3,m4){var c=m3;c=c.replace(/^([ \t]*)/g,"");c=c.replace(/[ \t]*$/g,"");c=_EncodeCode(c);return m1+"<code>"+c+"</code>";});return text;};var _EncodeCode=function(text){text=text.replace(/&/g,"&amp;");text=text.replace(/</g,"&lt;");text=text.replace(/>/g,"&gt;");text=escapeCharacters(text,"\*_{}[]\\",false);return text;};var _DoItalicsAndBold=function(text){text=text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g,"<strong>$2</strong>");text=text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g,"<em>$2</em>");return text;};var _DoBlockQuotes=function(text){text=text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,function(wholeMatch,m1){var bq=m1;bq=bq.replace(/^[ \t]*>[ \t]?/gm,"~0");bq=bq.replace(/~0/g,"");bq=bq.replace(/^[ \t]+$/gm,"");bq=_RunBlockGamut(bq);bq=bq.replace(/(^|\n)/g,"$1  ");bq=bq.replace(/(\s*<pre>[^\r]+?<\/pre>)/gm,function(wholeMatch,m1){var pre=m1;pre=pre.replace(/^  /mg,"~0");pre=pre.replace(/~0/g,"");return pre;});return hashBlock("<blockquote>\n"+bq+"\n</blockquote>");});return text;};var _FormParagraphs=function(text){text=text.replace(/^\n+/g,"");text=text.replace(/\n+$/g,"");var grafs=text.split(/\n{2,}/g);var grafsOut=new Array();var end=grafs.length;for(var i=0;i<end;i++){var str=grafs[i];if(str.search(/~K(\d+)K/g)>=0){grafsOut.push(str);}
else if(str.search(/\S/)>=0){str=_RunSpanGamut(str);str=str.replace(/^([ \t]*)/g,"<p>");str+="</p>"
grafsOut.push(str);}}
end=grafsOut.length;for(var i=0;i<end;i++){while(grafsOut[i].search(/~K(\d+)K/)>=0){var blockText=g_html_blocks[RegExp.$1];blockText=blockText.replace(/\$/g,"$$$$");grafsOut[i]=grafsOut[i].replace(/~K\d+K/,blockText);}}
return grafsOut.join("\n\n");};var _EncodeAmpsAndAngles=function(text){text=text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&amp;");text=text.replace(/<(?![a-z\/?\$!])/gi,"&lt;");return text;};var _EncodeBackslashEscapes=function(text){text=text.replace(/\\(\\)/g,escapeCharacters_callback);text=text.replace(/\\([`*_{}\[\]()>#+-.!])/g,escapeCharacters_callback);return text;};var _DoAutoLinks=function(text){text=text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,"<a href=\"$1\">$1</a>");text=text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,function(wholeMatch,m1){return _EncodeEmailAddress(_UnescapeSpecialChars(m1));});return text;};var _EncodeEmailAddress=function(addr){function char2hex(ch){var hexDigits='0123456789ABCDEF';var dec=ch.charCodeAt(0);return(hexDigits.charAt(dec>>4)+hexDigits.charAt(dec&15));}
var encode=[function(ch){return"&#"+ch.charCodeAt(0)+";";},function(ch){return"&#x"+char2hex(ch)+";";},function(ch){return ch;}];addr="mailto:"+addr;addr=addr.replace(/./g,function(ch){if(ch=="@"){ch=encode[Math.floor(Math.random()*2)](ch);}else if(ch!=":"){var r=Math.random();ch=(r>.9?encode[2](ch):r>.45?encode[1](ch):encode[0](ch));}
return ch;});addr="<a href=\""+addr+"\">"+addr+"</a>";addr=addr.replace(/">.+:/g,"\">");return addr;};var _UnescapeSpecialChars=function(text){text=text.replace(/~E(\d+)E/g,function(wholeMatch,m1){var charCodeToReplace=parseInt(m1);return String.fromCharCode(charCodeToReplace);});return text;};var _Outdent=function(text){text=text.replace(/^(\t|[ ]{1,4})/gm,"~0");text=text.replace(/~0/g,"")
return text;};var _Detab=function(text){text=text.replace(/\t(?=\t)/g,"    ");text=text.replace(/\t/g,"~A~B");text=text.replace(/~B(.+?)~A/g,function(wholeMatch,m1,m2){var leadingText=m1;var numSpaces=4-leadingText.length%4;for(var i=0;i<numSpaces;i++)leadingText+=" ";return leadingText;});text=text.replace(/~A/g,"    ");text=text.replace(/~B/g,"");return text;};var escapeCharacters=function(text,charsToEscape,afterBackslash){var regexString="(["+charsToEscape.replace(/([\[\]\\])/g,"\\$1")+"])";if(afterBackslash){regexString="\\\\"+regexString;}
var regex=new RegExp(regexString,"g");text=text.replace(regex,escapeCharacters_callback);return text;};var escapeCharacters_callback=function(wholeMatch,m1){var charCodeToEscape=m1.charCodeAt(0);return"~E"+charCodeToEscape+"E";};};